Nadolig Cymru In Aotearoa

A teenage Welsh Christmas afternoon in New Zealand (2017).

Why Is Glass Transparent?

I know as a kid I thought adults knew everything - all adults knew all things, nope. Here's one I have long pondered and had concept what the answer could be, but now I know.

"... that's why you can't get a sun tan through glass" ... heck, I didn't even know that.